I was looking at this question and got worried, should I remove those two extra tags (soul-silver heart-gold)? So I asked in chat and got a good point from StrixVaria:

Pokemon is all messed up. There's a tag for Pokemon-fourth-gen but this question doesn't apply to all the 4th-gen games, just the 2nd gen remakes that are on the 4th gen engine. If you look through Pokemon questions in general you'll find a lot of tagging issues.

And I think he is right. Pokemon should have a proper resolution so we could "fix" the questions without worry. So:

How should we treat the tags in those questions?